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/* fetch.c - Alpine Package Keeper (APK)
*
* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
* Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation. See http://www.gnu.org/ for details.
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "apk_applet.h"
#include "apk_database.h"
#include "apk_state.h"
#include "apk_io.h"
#define FETCH_RECURSIVE 1
#define FETCH_STDOUT 2
#define FETCH_LINK 4
struct fetch_ctx {
unsigned int flags;
const char *outdir;
};
static int fetch_parse(void *ctx, int optch, int optindex, const char *optarg)
{
struct fetch_ctx *fctx = (struct fetch_ctx *) ctx;
switch (optch) {
case 'R':
fctx->flags |= FETCH_RECURSIVE;
break;
case 's':
fctx->flags |= FETCH_STDOUT;
break;
case 'L':
fctx->flags |= FETCH_LINK;
break;
case 'o':
fctx->outdir = optarg;
break;
default:
return -1;
}
return 0;
}
static int fetch_package(struct fetch_ctx *fctx,
struct apk_database *db,
struct apk_package *pkg)
{
struct apk_istream *is;
char infile[256];
char outfile[256];
int i, r, fd;
if (!(fctx->flags & FETCH_STDOUT)) {
struct stat st;
snprintf(outfile, sizeof(outfile), "%s/%s-%s.apk",
fctx->outdir ? fctx->outdir : ".",
pkg->name->name, pkg->version);
if (lstat(outfile, &st) == 0 && st.st_size == pkg->size)
return 0;
}
apk_message("Downloading %s-%s", pkg->name->name, pkg->version);
for (i = 0; i < APK_MAX_REPOS; i++)
if (pkg->repos & BIT(i))
break;
if (i >= APK_MAX_REPOS) {
apk_error("%s-%s: not present in any repository",
pkg->name->name, pkg->version);
return -1;
}
if (apk_flags & APK_SIMULATE)
return 0;
snprintf(infile, sizeof(infile), "%s/%s-%s.apk",
db->repos[i].url, pkg->name->name, pkg->version);
if (fctx->flags & FETCH_STDOUT) {
fd = STDOUT_FILENO;
} else {
if ((fctx->flags & FETCH_LINK) && apk_url_local_file(infile)) {
char real_infile[256];
int n;
n = readlink(infile, real_infile, sizeof(real_infile));
if (n > 0 && n < sizeof(real_infile))
real_infile[n] = '\0';
if (link(real_infile, outfile) == 0)
return 0;
}
fd = creat(outfile, 0644);
if (fd < 0) {
apk_error("%s: %s", outfile, strerror(errno));
return -1;
}
}
is = apk_istream_from_url(infile);
if (is == NULL) {
apk_error("Unable to download '%s'", infile);
return -1;
}
r = apk_istream_splice(is, fd, pkg->size, NULL, NULL);
is->close(is);
if (fd != STDOUT_FILENO)
close(fd);
if (r != pkg->size) {
apk_error("Unable to download '%s'", infile);
unlink(outfile);
return -1;
}
return 0;
}
static int fetch_main(void *ctx, int argc, char **argv)
{
struct fetch_ctx *fctx = (struct fetch_ctx *) ctx;
struct apk_database db;
int i, j, r;
r = apk_db_open(&db, apk_root, APK_OPENF_EMPTY_STATE);
if (r != 0)
return r;
for (i = 0; i < argc; i++) {
struct apk_dependency dep = (struct apk_dependency) {
.name = apk_db_get_name(&db, APK_BLOB_STR(argv[i])),
.result_mask = APK_DEPMASK_REQUIRE,
};
if (fctx->flags & FETCH_RECURSIVE) {
struct apk_state *state;
struct apk_change *change;
state = apk_state_new(&db);
r = apk_state_lock_dependency(state, &dep);
if (r != 0) {
apk_state_unref(state);
apk_error("Unable to install '%s'",
dep.name->name);
goto err;
}
list_for_each_entry(change, &state->change_list_head, change_list) {
r = fetch_package(fctx, &db, change->newpkg);
if (r != 0)
goto err;
}
apk_state_unref(state);
} else if (dep.name->pkgs != NULL) {
struct apk_package *pkg = NULL;
for (j = 0; j < dep.name->pkgs->num; j++)
if (pkg == NULL ||
apk_pkg_version_compare(dep.name->pkgs->item[j],
pkg)
== APK_VERSION_GREATER)
pkg = dep.name->pkgs->item[j];
r = fetch_package(fctx, &db, pkg);
if (r != 0)
goto err;
} else {
apk_message("Unable to get '%s'", dep.name->name);
r = -1;
break;
}
}
err:
apk_db_close(&db);
return r;
}
static struct apk_option fetch_options[] = {
{ 'l', "link", "Create hard links if possible" },
{ 'R', "recursive", "Fetch the PACKAGE and all it's dependencies" },
{ 's', "stdout",
"Dump the .apk to stdout (incompatible with -o and -R)" },
{ 'o', "output", "Directory to place the PACKAGEs to",
required_argument, "DIR" },
};
static struct apk_applet apk_fetch = {
.name = "fetch",
.help = "Download PACKAGEs from repositories to a local directory from "
"which a local mirror repository can be created.",
.arguments = "PACKAGE...",
.context_size = sizeof(struct fetch_ctx),
.num_options = ARRAY_SIZE(fetch_options),
.options = fetch_options,
.parse = fetch_parse,
.main = fetch_main,
};
APK_DEFINE_APPLET(apk_fetch);
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